Window-ventilator.



j. 8. EASTON.

WINDOW VENTILATUR.

APPLICAHON mm MAY 23. l9l6.

1,238,65 1 Patented Aug. 28, 1917 UNITED STATES Tl ATENT ()iiFl CE.

JAIYIES B. EASTGN. OF NEVJ YORK. N, Y.

WINDON-VENTILATOR.

Application filed May 23. 1916.

To all whom, it may concern.

Be it known that I, James B. EAS'ION, a citizen of the United States, residing at New York city, in the county of New York. State of New York, have invented certain new and useful Improvements in lVindow-Ventiho tors; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in thc'art to which it appertains to make and use the same.

This invention relates to improvements in ventilators, and has special reference to that type of ventilator which is used in connection with a window having a vertically sliding lower sash.

An important object of the invention is to provide an improved form of window ventilator wherein the opening for the admission of air will be varied in size by the intensity of the draft passing through such ventilator, the variation in the draft pres sure being caused principally by the varia tion of wind pressure outside of the building wherein the ventilator is used.

Another important object of the invention is the provision of an improved ventilator of this .type wherein improved means will be utilized for regulating the maximum opening in such a ventilator so that the. latter may be partially closed during excessively cold and still weather.

With the above and other objects in view, as will be hereinafter apparent the invention consists in general of certain novel details of construction and combinations of parts hereinafter fully described, illus trated in the accompanying drawings and specifically claimed.v

In the accompanying drawings, like characters, of reference indicate like parts in the several views, and

Figure 1 is a plan view of such a ventilator showing its relationship to the cooperating parts of the window frame and sash;

Fig. 2 is an outside elevation of a. portion of a window frame and sash showing the ventilator in position;

Fig. 3 is a section on the line 3--3 of Fig. 1 and showing the. ventilator closed in dotted lines;

Fig. 4 is an enlarged detail section show ing the regulator or stop used to limit the extent of opening of the ventilator.

In the present embodiment of the inven- Specification of Letters Patent.

Patented Aug. 358, i917.

Serial No. as 34 tion the same baeen shown as applied lo :1 window whereof the sides ol the i'rannare shown at L0. th will at. ll. the sto l at l'. and a sliding sa-h at l3.

The inventi n itself consists of a asing having an open fr nt or outer side uined partly by the vt-rti 'allv spaced longitudinal im-mbers 1d and partly by the end mem bers L5. These end members have their upper outer corners rnbbeted as at if) t receive the lower part, of the top member H and have their upper edges connected by a top member '17. The inner and under ed es of the members 15 are inclined to each ot ier at an obtuse angle, the under edge being inelined upwardly from front, to rear as can be clearly seen by reference to Fig. 3. The mner or rear edge of thetop member 17 has depending beneath it a guard apron l8 having its lower edge transversely arcuate as at 19 and secured to the end members 15 in spaced-aline1uent below the apron 18 is a supporting plate or rib 20. The bottom is closed in by a closure 21 and the inner side by a closure 22 which extends upward to the top edges of the ends 15 and between whose upper edge and the inner or rear edge of the top 17 is secured a wire screen :23 to keep out insects and the like.

Journaled in the ends 15 just below the top 17 and close.- to the upper member 14 is a valve plate 24 which"nornially hangs down as shown in full lines in Fig. 8. This valve plate has secured to its inner face an areuate guard plate 25 which movesbn'eath the areuate lower edge of the apron 18, the curvature of said edge. and guard plate bemg concentric to the 1ournal axis. The true bottom of the casing consists of a transversely arcuatc metal plate 26 the center of curvature of which lies outside and below the horizontal plane of the journal axis so that as the free edge of the valve plate '24 swings inward, under the influence of wind pressure on its outer face, this edge will approach the bottom and thus reduce the 26 is so positioned on the support or rib 20 that the free edge of the valve plate 24 will almost touch such upper edge when swung into proximity thereto. In order to re vent opening of the space if the valve p ate swings inwardly of this bottom there is pro- \ided a supplemental bottom 27 arranged rearwardly of the bottom 26 and transversely curved concentric to the journal axis.

At times, as when the weather is cold and still, it is desirable to partly close the valve and in order to effect this an adjusting screw 28 is threaded through the top 17, a plate 29 being used to )revent wear. This screw has its lower end positioned adjacent the outer face of the valve plate and is arranged to engage an elastic buffer 30 carried by a spring member or arm 31 fixed to the outer face of the valve late. By this means the valve may be part y closed by screwing the adjustin screw downward and yet left free to close urther under wind pressure.

It is obvious that the valve may be wholly closed by sufficient adjustment of the screw downward and that the bufl'er will prevent an leasant noises.

0 hold the ventilator removably in lace, fastening means typified by the bea s 32 may be employed and the ventilator may be equipped with weather strips 33.

There has thus been rovided a simple and efiicient device of the hind described and for the purpose specified. It is obvious that many minor changes may be made in the form and construction of the invention without departing from the material principles thereof. It is not therefore desired to confine the invention to the exact form herein shown and described but it is wished to include all such as properly come wi hin the scope claimed.

Having thus described the invention, what is claimed as new, is

1. In a window ventilator, the combination with a casing having an inner wall and a top member spaced outwardly from the to of the inner wall, a guard apron depen ing from the inner edge of the top member, a valve plate journaled beneath the top, an arcuate guard plate carried by the va ve plate, said ard late bein concen tr1c to the journa s of t e valve p ate having its free portion extending beneath the lower edge 0 'the apron in close proximity thereto, said casin having a bottom portion located beneath the path of the free ed 0 of the valve plate and curved eccentrical of the valve plate journals to cause the free edge of the valve plate to approach the bottorn as the valve swings inwardly.

2. A window ventilator comprising a rectangular frame, end walls projecting from one face of said frame, a bottom wall and a front wall connecting the end walls of the frame, a top wall terlm'natin short of the upper ed 9 of the front wal a guard apron depen mg lfrom said top wall, a swinging valve plate depending from said top wal and normally ying 1n the same plane as the guard apron, a ide member carried by said swin va ve plate and adapted to engage the ower edge of the guard apron, and means projecting through the top wall and the swinging valve plate 'for restricting the passage openin controlled thereby.

ln testimony whereof, I aflix my signature, in the presence of two witnesses.

' JAMES B. EASTON.

Witnesses:

ANNIE Wsmucn, Geo. L. Gmmm. 

